[PDF] duplicates, stata.com duplicates — Report, tag, or drop duplicate observations. Title stata.com isid — Check for unique identiﬁers DescriptionQuick

Thus, if values of a variable are 1, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, and 5, then in one sense of “unique”, there are five distinct or unique values—namely, 1, 2, 3, 4, and 5—whereas in another sense there is just one unique value—namely, 1, the only value that occurs precisely once.

You can check for duplicate observations in Stata in the following ways: The isid command can detect duplicate observations: . isid x1 x2 x3; The duplicates command can list and flag duplicate observations. The list subcommand lists the duplicate observations: . duplicates list x1 x2 x3 By adding an option unique, we also request information on groups that have a unique observation. For example, dups id, unique group by: id groups formed: 1 groups of duplicate observations: _group _count 1 3 unique observations: _group _count 1 1 2 1 3 1 4 1 5 1 unique in this way. Indeed, as we shall see, such usage is also to be found in oﬃcial Stata.

Med tanke på att tid för bloggande tycks bli svår att få tag i, är Instagram ett snabbt och Ho aspettato a scriverti perché sono stata travolta da incombenze e – per From minimal decor to colorful decor to unique decor for your modern home, Essuited items to flat se more i stata i NTCODE Peter Partia Mika u ZK 3 tea 3 Ag tackar min Gud / så ofta tag Tadar tive , l.omidra tender med sanningenne Jag / tag rifrer ) och går Herrās snaro i Mizpa stålt hafwen / och ettdt . unin wagi tag förer them bort och instraff 1 jstrådt Jhafta ett ftdtiohiertal och stata inter ? Label: Android Avà ci hè stata nova infurmazione annantu à u Pixel 5. Ci hè stata recentemente infurmazione chì u Google Pixel 5 pò avè una camera nantu à a Den är snygg med och utan skal och den lila kulören är verkligen cool.

RE: st: Count of unique cases by group. Perfect. Thanks Nick! Your code has a number of additional insights (for me) in it over and above answering the questions. Best, Ben Ben Hoen LBNL Office: 845-758-1896 Cell: 718-812-7589 -----Original Message----- From: owner-statalist@hsphsun2.harvard.edu [ mailto:owner-statalist@hsphsun2.harvard.edu] On

It describes data contents but also simply identifies unique values. Number of unique values of mpg is 21. Looking at the help of the command, it does not seem possible to store this value.

This is an updated version of Michal McMahon's Stata notes. To avoid this problem we can specify a new variable that will be a unique cluster identifier again: Tags can take two forms, either a tag applies to all text that fol

EDIT: So then the id of tagged observations is just . by A B C: gen dup_id = id[1] For basic technique with by: see (e.g.) this discussion distinct is a user-written program from the Stata Journal, as you are asked to explain (FAQ Advice #12). search distinct in Stata brings up clickable links. I've edited the output below, but anyone interested should unique (SSC) is not unique. Nothing hinges on it, but when writing distinct (with Gary Longton) we (or at least I) left creation of a new variable on one side as already covered by code similar or even identical to that in #3. The two programs have been ignoring each other for about a decade, without there being human ill-will at all!

isid x1 x2 x3; The duplicates command can list and flag duplicate observations. The list subcommand lists the duplicate observations: . duplicates list x1 x2 x3 So, if I have, e.g.
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stata怎么求不重复值的个数？,位stata高手，怎么才能找出不重复值的个数？变量A的那一列里有很多值是相同的，我想生出不相同值的个数，用su A的出来的是所有观察值的个数。 Stata has two built-in variables called _n and _N.

For the other way round use _n > 1, _n != 1, or whatever. EDIT: So then the id of tagged observations is just .
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Dear Stata community, I am using Stata 13.1 to analyze survey data. I have discovered that some individuals have taken my survey twice or three times. I am able to identify these with the duplicates command and tag them having identified a group of variables which in combination should be unique for each unique respondent. I would like to go a

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Faster Stata for Big Data. including: collapse, reshape, xtile, tabstat, isid, egen, pctile, winsor, contract, levelsof, duplicates, unique/distinct, and more.

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Academic writing software. Combine text, graphs & statistical analysis Example: I usually export regression tables from Stata in file format .tex, and Thus, if values of a variable are 1, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, and 5, then in one sense of “unique”, there are five distinct or unique values—namely, 1, 2, 3, 4, and 5—whereas in another sense there is just one unique value—namely, 1, the only value that occurs precisely once. The variable hhid has 60 unique values and if I understand the data correctly, this means there are 100 observations from 60 households. Last edited by Friedrich Huebler ; 12 Sep 2017, 19:39 . Comment In the dataset, the variable id is the unique case identifier. To add the duplicate observations, we sort the data by id, then duplicate the first five observations (id = 1 to 5). This leads to 195 unique and 5 duplicated observations in the dataset.

Coding in Python is a little different than coding in Stata. In Stata, you have one dataset in memory.